The Oyster Perpetual DATEJUST 31
Oyster, 31 mm, steel, Everose gold and diamonds DATEJUST 31 The elegant design and Cyclops eye magnifying the date have made the Oyster Perpetual Datejust, originally introduced in 1945, one of the world s most recognizable watches.
Reference 178341 MODEL CASE MOVEMENT BRACELET MODEL CASE Oyster, 31 mm, steel, Everose gold and diamonds OYSTER ARCHITECTURE Monobloc middle case, screw-down case back and winding crown DIAMETER 31 mm MOVEMENT Perpetual, mechanical, self-winding CALIBRE 2235, Manufacture Rolex FUNCTIONS Centre hour, minute and seconds hands. Instantaneous date with rapid setting. Stopseconds for precise time setting BRACELET Oyster, flat three-piece links BRACELET MATERIAL Everose Rolesor - combination of 904L steel and 18 ct Everose gold CLASP Folding Oysterclasp with Easylink 5 mm comfort extension link MATERIAL Everose Rolesor - combination of 904L steel and 18 ct Everose gold BEZEL Domed, set with diamonds WINDING CROWN Screw-down, Twinlock double waterproofness system WINDING Bidirectional self-winding via Perpetual rotor POWER RESERVE Approximately 48 hours PRECISION -2/+2 sec/day, after casing DIAL DIAL Chocolate set with diamonds GEM-SETTING Large VI set with diamonds CRYSTAL Scratch-resistant sapphire, Cyclops lens over the date WATER-RESISTANCE Waterproof to 100 metres / 330 feet CERTIFICATION CERTIFICATION Superlative Chronometer (COSC + Rolex certification after casing)
Style of the Datejust 36 THE CLASSIC WATCH OF REFERENCE The Datejust 36 is the modern archetype of the classic watch, thanks to aesthetics and functions that transcend changes in fashion. Aesthetically, the Datejust 36 has spanned eras, while retaining the enduring codes that make it, notably in its traditional versions, one of the most recognised and recognisable of watches. 4
Function of the Datejust 36 WHAT A DIFFERENCE A DATE MAKES The Datejust 36 was the first self-winding waterproof chronometer wristwatch to display the date in a window at 3 o clock on the dial hence its name. In the earliest models, the date would begin to change hours before its midnight rendezvous. In 1955, the date-change mechanism was adapted to operate instantaneously and the date aperture was enhanced with a Cyclops lens, magnifying the date for easy reading. 5
Spirit of the Datejust 36 HISTORY OF THE DATEJUST The Datejust 36, introduced in 1945, was the first wristwatch to display the date through an aperture on the dial. Its unique magnifying Cyclops eye, added several years later, became recognised as a Rolex standard. Admired for its classic design, the Datejust 36 has become an iconic symbol of style. 6
Features TWINLOCK WINDING CROWN The screw-down winding crown and the case with screw-down back form the core of the Oyster. Created by Rolex in 1953, the Twinlock system ensures that the screw-down crown is waterresistant thanks to two sealed zones, one inside the tube of the crown, the other inside the winding crown itself. This system is used on all the watches in the Oyster collection that are guaranteed waterproof to 100 metres (330 feet). 7
Features THE CYCLOPS LENS The Cyclops lens enhances the date aperture, magnifying the date display for easy reading. It is one of the most distinctive Rolex features, and one of the most recognisable. 9
Features JUBILEE BRACELET The Jubilee, a supple and comfortable five-piece link metal bracelet, was designed and made especially for the launch of the Oyster Perpetual Datejust 36 in 1945. The Jubilee is fitted with a concealed Crownclasp. 10
Features OYSTER BRACELET The Oyster bracelet is a perfect alchemy of form and function, aesthetics and technology. First introduced in the late 1930s, this particularly robust and comfortable metal bracelet with its broad, flat three-piece links remains the most universal bracelet in the Oyster collection. 11
Features THE OYSTER CASE The Oyster case is one of the foundations of the reputation for excellence of Rolex watches. Invented by Rolex in 1926, it was the world s first waterproof case for a wristwatch thanks to its patented system of screwing down the bezel, case back and winding crown against the middle case. Like the mollusc, the Rolex Oyster is robust and clamped shut. It provides a hermetic environment that protects the high-precision Perpetual movement from water, dust, or pressure. 12
Features SUPERLATIVE CHRONOMETER The green seal accompanying every Rolex watch is a symbol of its status as a Superlative Chronometer. This exclusive designation attests that it has successfully undergone a series of specific final controls by Rolex in its own laboratories according to its own criteria, in addition to the official COSC certification of its movement. This unique testing of the chronometric precision of the cased-up movement, as well as of the watch s waterproofness, self-winding and power reserve, pushes back the boundaries of performance and makes Rolex the benchmark for excellence in mechanical watches. The green seal is coupled with a five year guarantee which applies to all Rolex models. 13
Where to buy a Rolex THE OFFICIAL ROLEX RETAILER Only official Rolex retailers, distinguishable by this official green plaque, are allowed to sell and maintain a Rolex. With the necessary skills, technical know-how and special equipment, they guarantee the authenticity of each and every part of your Rolex, not to mention its reliability over time, helping you make the choice that will last a lifetime. Find your retailer on rolex.com 14
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